If Safari is the new IE what should I use instead that doesn't suck down battery like it's going out of style, works with iCloud Keychain, and is fast? I'm not

If Safari is the new IE what should I use instead that doesn't suck down battery like it's going out of style, works with iCloud Keychain, and is fast? I'm not going to spend time moving to Edge, or Firefox (Chrome is not even an option, see https://chromeisbad.com https://chromeisbad.com) if I have to reset passwords across hundreds of websites and those passwords don't automatically sync across all of my devices. These other browsers also don't integrate well with the system, have a different look/feel, don't behave the same when managed using Moom for resizing because they have their own layout engines, and don't hook into the system dictionary or editing features. I want a single cohesive whole that works well together.